Radio speaker attachment



Nov. 16, 1965 E. D. FAULKNER 3,217,829

RADIO SPEAKER ATTACHMENT Filed July 31, 1964 RECEIVE E mes! D. Faulkner IN VEN TOR.

United States Patent 3,217,829 RADIO SPEAKER ATTACHMENT Ernest D. Faulkner, 205 W. 2nd St., Ayden, N.C. Filed July 31, 1964, Ser. No. 386,550 4 Claims. (Cl. 181-61) This invention relates to improvements in the sound reproducing capabilities of radio receiving sets and signal receiving devices in general.

The present invention is concerned with an economical method of improving the reproduction of music through the output speakers of radio receiving apparatus. In particular, the present invention is useful in combination with relatively small transistorized radio receivers necessarily provided with low power output speakers having poor reproducing qualities. By attachment of the apparatus of the present invention to such receiving sets, music may be reproduced with a significantly improved tone and quality. The arrangement and construction of the apparatus is also designed for economical manufacture and easy handling. The apparatus of the present invention will also be useful in combination with the output speakers of television receiver sets and relatively cheap output speakers associated with phonograph devices.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a side elevational view showing the use of the present invention in combination with a typical transistorized radio receiver.

FIGURE 2 is a sectional view taken substantially through a plane indicated by section line 22 of FIG- URE 1.

FIGURE 3 is a top plan view of the sound amplifier as viewed from section line 33 in FIGURE 2, at a reduced scale.

FIGURE 4 is a diagrammatic illustration of the system of the present invention.

Referring now to the drawings in detail, it will be observed that the apparatus of the present invention may be associated with a signal receiving device as diagrammatically illustrated in FIGURE 4. The receiving device may be of any type including a transistorized radio such as the receiving set 12 illustrated in FIGURE 1. It will be appreciated of course, that other signal receiving devices could be utilized in combination with the present invention including for example television receiver sets and phonograph devices which include a low power output speaker 14 operatively coupled to the receiving circuit through a power output amplifier 16. An auxiliary speaker 18 of any conventional type is connected in parallel to the output speaker 14 by a suitable plug-in connection so that the amplified output signal of the receiver 10 may be reproduced by both the speaker 14 and the speaker 18. One of the connecting lines may also be provided with a capacitor device 20 so as to eliminate static.

The auxiliary speaker 18 is mounted on and operatively associated with an acoustical enclosure generally referred to by reference numeral 22. The acoustical enclosure 3,217,829 Patented Nov. 16, 1965 is in the form of a metallic can having an axial length of approximately 13" and a diameter of approximately 13 /2. The can is open at One end 24 and closed at the opposite axial end by a flat wall 26 on which the auxiliary speaker 18 is mounted. As shown in FIGURES 1, 2 and 4, the auxiliary speaker is mounted on the acoustical enclosure in non-coaxial relation thereto.

The end wall 26 of the enclosure is formed with a rectangular opening 28. Adjacent each corner of the opening 28, are fastener apertures 30 through which four fastener elements 32 extend for securing the auxiliary speaker to the wall 26. Two rubber coated, wooden spacer elements 34 are aligned with two of the apertures 30 so that two of the fastener elements will secure the rim portion 36 of the auxiliary speaker in spaced relation to the wall at two circumferentially spaced locations, while the rim portion 36 will be directly secured to the wall at the other two circumferentially spaced locations. Also, the interior surfaces of the can are provided with a coating of rubber base paint 38 constituting a cushioning layer for improving the tone of the sound emanating from the acoustical enclosure.

From the foregoing description, the construction and utility of the apparatus of the present invention will be apparent. As a result of the described arrangement, the bass frequencies of the sound being reproduced by the output speaker of a signal receiver, are amplified. The tone and quality of music thus reproduced by the output speaker of the signal receiving device, is significantly improved at a minimum expense and with little effort.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. In combination with a signal receiving device, an auxiliary speaker, an acoustical enclosure for amplifying bass frequencies, said acoustical enclosure comprising, a tubular can forming a chamber closed at a rearward end and open at a forward end, said closed end being formed with an opening dimensionally smaller than the auxiliary speaker, and mounting means securing the auxiliary speaker at an angle to the closed end overlying the opening therein to rearwardly vent the chamber.

2. The combination of claim 1 wherein said mounting means comprises, spacer means disposed between portions of the auxiliary speaker and the closed end of the acoustical enclosure, and fastener elements securing the auxiliary speaker to the acoustical enclosure at said angle to the closed end of the tubular can.

3. In combination with a signal receiving device, an auxiliary speaker, an acoustical enclosure for amplifying bass frequencies, said acoustical enclosure comprising, a tubular member having a wall at one end and open at the other end, said wall being formed with a rectangular opening, and mounting means for securing the speaker to the wall at an angle thereto including four apertures in the end wall adjacent the corners of said opening, fastener elements extending through said apertures and spacer elements aligned with two of said apertures for support of the auxiliary speaker at said angle to the wall.

4. In combination with an audio signal receiving device having a relatively low power output speaker, an acoustical device connected to the signal device comprising an auxiliary speaker having a mounting rim, a tubular enclosure defining a chamber open at one end and closed by a flat wall at the other end, said flat wall having an opening dimensionally smaller than the mounting rim of the auxiliary speaker, and means mounting said auxiliary speaker on the flat wall overlying the opening therein including at least two spacers spacing the mounting rim from the fiat wall at two locations and fasteners References Cited by the Examiner UNITED STATES PATENTS 10/1929 Harrison 181-27 6/1930 Baldwin 18131 7/1932 Black 18131 9/1932 Stephens 181-3l 12/1937 Olson 181-31 7/1959 Gellman 181-31 6/1964 Thaler 181--31 FOREIGN PATENTS 1/1953 Germany.

securing the mounting rim to the spacers and the flat wall 15 LEO SMILOW, Primary Examiner- EYLAND M. MARTIN, Examiner.

in contact with the flat wall at other locations. 

1. IN A COMBINATION WITH A SIGNAL RECEIVING DEVICE, AN AUXILIARY SPEAKER,AN ACOUSTICAL ENCLOSURE FOR AMPLIFYING BASS FREQUENCIES, SAID ACOUSTICAL ENCLOSURE COMPRISING, A TUBULAR CAN FORMING A CHAMBER CLOSED AT A REARWARD END AND OPEN AT A FORWARD END, SAID CLOSED END BEING FORMED WITH AN OPENING DIMENSIONALLY SMALLER THAN THE AUXILARY SPEAKER, AND MOUNTING MEANS SECURING THE AUXILIARY SPEAKER AT AN ANGLE TO THE CLOSED END OVERLYING THE OPENING THEREIN TO REARWARDLY VENT THE CHAMBER. 